rThis week's leg of the gastronomic pilgrimage round Britain finds the chef in Lancashire for hotpot, black puddings and Mrs Kirkham's crumbly cheese. Then the Lake District offers wild boar and the famous Herdwick sheep - although foot-and-mouth disease is a spectre that haunts the region. Director/Producer David Pritchard BBC BOOK: Rick Stein 's Food Heroes. available in hardback. L20 Gourmet gadgets: page